GRONEFELD – 1941 Quadrivium Remontoire Tourbillon Tantalum or Platinum Edition

GRONEFELD – 1941 Quadrivium Remontoire Tourbillon Tantalum or Platinum Edition 2026 

 Click, to see the large size. ▶ BIG FOTO 

Grönefeld Unveils the 1941 Quadrivium: 

A New Masterpiece by the Horological Brothers

After years of sustained demand for several of its most celebrated and now discontinued timepieces, including the One Hertz, Parallax Tourbillon and Remontoire, Bart and Tim Grönefeld proudly introduce a new pinnacle of complicated high horology: the Grönefeld 1941 Quadrivium.

 Click, to see the large size. ▶ BIG FOTO

Developed entirely from the ground up, the 1941 Quadrivium brings together four of the independent watchmaker’s most admired complications in a single, extraordinary timepiece: a 7.5-second remontoire, a one-minute flying tourbillon, central jumping seconds, and a power-reserve indicator. 

 Click, to see the large size. ▶ BIG FOTO 

The movement is equipped with serially connected concentric twin barrels, providing the energy required to drive this exceptionally complex mechanism.

  Click, to see the large size. ▶ BIG FOTO

The result is a technical and artistic achievement that has already earned an affectionate nickname among those who have encountered it: “Grönefeld’s Greatest Hits.”

Four Disciplines, One Exceptional Timepiece

The name Quadrivium originates in classical scholarship, where arithmetic, geometry, music and astronomy were regarded as four foundational disciplines forming an integrated whole. 

   Click, to see the large size. ▶ BIG FOTO 

At Grönefeld, the name alludes to the four mechanical complications that define this new creation.

  Click, to see the large size. ▶ BIG FOTO

The 1941 Quadrivium brings together the horological ideas and technical signatures associated with some of Grönefeld’s most acclaimed creations, while introducing them in an entirely new movement conceived specifically for this watch

  Click, to see the large size. ▶ BIG FOTO

At 6 o’clock, a raised one-minute flying tourbillon provides a dramatic focal point. At 9 o’clock, an exposed governor rotates once every 7.5 seconds, visually revealing the operation of the remontoire. 

  Click, to see the large size. ▶ BIG FOTO 

A large central jumping-seconds hand provides an unmistakable display of the seconds, while the 50-hour power-reserve indicator occupies the 10 o’clock position. Hours and minutes are displayed at 2 o’clock.

A Distinctive Expression of the 1941 Design

First introduced in 2016, Grönefeld’s 1941 case design has become an increasingly iconic element of the brand’s design language, shared by the Remontoire, Principia, Decennium and Grönograaf. 

   Click, to see the large size. ▶ BIG FOTO 

The Quadrivium’s case measures 40.0 mm in diameter and 11.3 mm in height.

 Click, to see the large size. ▶ BIG FOTO 

The dial combines a finely frosted main surface with hand-beveled stainless steel elements and polished, multi-faceted white gold hour markers. Traditional blued steel hands complete the restrained yet highly detailed aesthetic. 

 Click, to see the large size. ▶ BIG FOTO 

Collectors can choose from five different base colours for the dial. These colours will be announced on our website a few weeks after the launch.

  Click, to see the large size. ▶ BIG FOTO

Turning the watch over reveals a sapphire exhibition case back, offering an unobstructed view of the elaborately finished movement and its 473 components. 

  Click, to see the large size. ▶ BIG FOTO

As with every Grönefeld creation, the architecture and finishing of the calibre are intended not merely to demonstrate technical sophistication, but to make the movement itself an integral part of the watch’s visual experience.

Limited Editions

The Premiere Edition is limited to 28 pieces, each featuring a case and buckle crafted from Tantalum. A further limited edition of 28 pieces is available with a case and buckle crafted from Platinum.

  Click, to see the large size. ▶ BIG FOTO

The 1941 Quadrivium is priced at €280,000 in Tantalum and €310,000 in Platinum, excluding taxes.

  Click, to see the large size. ▶ BIG FOTO 

Deliveries of the Tantalum Première Edition are scheduled to commence in 2027.

  Click, to see the large size. ▶ BIG FOTO 

With the 1941 Quadrivium, Bart and Tim Grönefeld bring together several of the technical concepts that have defined their work over the years in a completely new expression of high-end watchmaking.

  Click, to see the large size. ▶ BIG FOTO 

Created in limited numbers and conceived for discerning connoisseurs who value both mechanical ingenuity and traditional hand-finishing, the 1941 Quadrivium embodies Grönefeld’s continuing pursuit of innovation, craftsmanship and horological excellence.

 Click, to see the large size. ▶ BIG FOTO 

The Grönefeld 1941 Quadrivium: four complications, one extraordinary expression of high-end watchmaking.

 Click, to see the large size. ▶ BIG FOTO 

 -----------------------------------------
TECHNICAL SPECIFICATIONS

Collection Grönefeld 1941 Quadrivium 

Model: 1941 Quadrivium Remontoire Tourbillon Edition

 Click, to see the large size. ▶ BIG FOTO 

 Première Edition: 28 pieces (in Tantalum)

 Click, to see the large size. ▶ BIG FOTO

 Platinum Edition: 28 pieces

Case
Material: Tantalum or Platinum
Diameter: 40.0 mm
Thickness: 11.3 mm
Crown: Engraved with “G” logo
Case back: Sapphire crystal exhibition back, engraved with the serial number and secured by eight security screws
Water-resistant to 3 atm - 30 meters - 100 feet
Dial 
Dial: Frosted main dial with hand-bevelled stainless steel elements and polished, multi-faceted white-gold hour markers. Choice of five different base colours for the dial. To be announced on Grönefeld website
Hands: Hours and minutes, large counter poised seconds, power-reserve. All hands are steel and heat blued

• Tourbillon: One-minute stainless steel flying tourbillon at 6 o’clock
• Remontoire: 7.5-second remontoire with exposed governor at 9 o’clock
• Seconds: Central jumping seconds.
• Hacking seconds: Smooth tourbillon stop at the 60 seconds position
• Power reserve of 50 hours, displayed at 10 o’clock
• Time display: Hours and minutes at 2 o’clock, Central Jumping Seconds

Movement
Calibre G-09
Mechanical hand-wound movement; tourbillon, remontoire, dead seconds and power reserve indicator
Concentric twin barrels connected in series
Diameter: 32.0 mm
Thickness: 6.15 mm
Number of parts: 473
Number of jewels: 49, partially set in gold chatons
Barrels: Two coaxially arranged barrels connected in series toprovide a continuous and balanced energy supply
Tourbillon: One minute flying tourbillon cage made in stainless steel Durnico
Balance wheel: Titatium free sprung variable inertia balance wheel (10.0 mm diameter)
Frequency: 3 Hz, 21.600 vibrations/hour
Power reserve of 50 hours
A satellite-wheel mechanism provides a precise indication of the remaining power reserve
Balance spring: Phillips terminal overcoil curve; Geneva-style stud
Escapement: Swiss lever escapement
Finishing
Main plate: Spotted and snailed ruthenium plated brass
Bridges: Hand bevelled; stainless steel. Micro-blasted centre; circular grain on the top; relief engraved in the micro blasted surface 
Indications
Small hours and minutes at 2 o’clock
Extra long jumping seconds hand at the center
Power reserve indicator at 10 o'clock
Visible flying tourbillon cage at 6 o’clock
Visible governor of the remontoire mechanism at 9 o'clock
Strap 
Hand-sewn leather, 20mm-18mm (Tantalum) approximately 108 grams, including strap and buckle
Ostrich leather strap, 20mm-18mm (Platinum) approximately 120 grams, including strap and buckle
Tantalum or Platinum pin buckle, engraved with Grönefeld logo. 18mm

🔰Limited Editions to ✅ Only ❱❱❱ 28 pieces
🔴 Price: MSRP💰
EUR 280'000 in Tantalum
EUR 310'000 in Platinum

------------------------------
Press releases - 2026
------------------------------ 

 ----------------------------------------------------------
www.facebook.com - Gronefeld Watches
----------------------------------------------------------------
www.Gronefeld.com

Gronefeld - 1969 DeltaWorks Automatic

GRÖNEFELD – 1969 DeltaWorks Automatic Colours Dial 44.5 mm Stainless steel  - 2022

 Click, to see the large size. ▶ BIG FOTO

Bart and Tim Grönefeld, aka ‘The Horological Brothers’, are third-generation watchmakers. Like their forebears, they live and work in Oldenzaal in the Netherlands. They are proud of their heritage as well as the nation they call home.

 Click, to see the large size. ▶ BIG FOTO

The Netherlands is characterised by flat, low-lying plains. Indeed, 17% of the land was formerly underwater. Unfortunately, the country’s unique topography has sometimes led to floods and, sadly, loss of life. 

 Click, to see the large size. ▶ BIG FOTO 

In 1953, a north-westerly storm of biblical proportions, coupled with the spring tide, led to huge swathes of the Netherlands flooding. Unfortunately, 1836 people lost their lives, numerous animals drowned and vast numbers of people were displaced.

 Click, to see the large size. ▶ BIG FOTO

A consequence of the country’s unique topography and its sometimes perilous relationship with the sea is that the Netherlands has become a world leader in the field of water management and associated engineering. The ‘Delta Works’, built to protect the Zeeland region, comprises dams, dikes, locks, sluices and a storm surge barrier. Taking several years to construct, the Delta Works includes the world’s largest surge barrier and is widely regarded as a triumph of engineering.

 Click, to see the large size. ▶ BIG FOTO

Inspired by the Dutch Delta Works, The Horological Brothers have conceived their first sports utility watch, the aptly named 1969 DeltaWorks which also references the year Bart was born. The model is designed to cope with the perils of water ingress and shocks while still upholding the elevated standards of horology and traditional craftsmanship that are synonymous with the Grönefeld name.

The dial – its purpose is clear

The dial of the Grönefeld 1969 DeltaWorks presents the essentials of time, namely, hours, minutes and seconds. There is nothing superfluous. In fact, when designing the watch, Bart and Tim were keen to ensure that the dial imparted information in a clear, intelligible format. 

 Click, to see the large size. ▶ BIG FOTO

To deliver peerless legibility, day or night, the hands and hour markers are treated with Super-LumiNova®, that produces a blue glow in restricted light.

 Click, to see the large size. ▶ BIG FOTO

While the dial is highly practical it is still enriched with numerous details. For example, the hour track sits on a higher plane than the central dial area and small seconds display. 

 Click, to see the large size. ▶ BIG FOTO

The plump lancine-style hour and minute hands deliver impressive readability even in the most challenging conditions. At the fulcrum of the hands, the ‘centres’ are black polished to a gleaming conclusion.

 Click, to see the large size. ▶ BIG FOTO

The small seconds display features ‘60’, presented in an orange hue, a respectful nod to the brothers’ homeland. Likewise, the country of origin is proudly proclaimed at the base of the dial.

A watch for all occasions

The Grönefeld 1969 DeltaWorks is presented in a 45mm stainless steel case, measuring 12.5mm in height. The case features an integrated strap that ergonomically encircles the wrist, conferring a high degree of wearer comfort while appearing smaller than its stated dimensions would suggest. The scale of the case endows the watch with a generously proportioned dial area, augmenting legibility but without appearing unduly large. Every aspect of the case has been carefully considered.

 Click, to see the large size. ▶ BIG FOTO

Two inserts are integrated within each caseband, steadfastly secured to the main body of the case. The inserts are offered in two formats: stainless steel, matching the case material, or titanium shrouded in coloured FKM rubber, designed to match the shade of the strap. A notable attribute of the latter option is that there is less risk of the case band picking up annoying scratches. Throughout the composition, the case juxtaposes brushed and highly polished surfaces, contributing to the model’s notable allure.

 Click, to see the large size. ▶ BIG FOTO

A triple-seal, screw-down crown mitigates the risk of dust or water ingress. In addition, the crown features an ingenious safeguarding system. When the Grönefeld logo on the crown is perpendicular to the dial and pointing upwards, the triple-seal, screw-down crown delivers maximum protection. The sapphire crystals, to the front and rear, are thicker than normal and, by default, stronger. As a result of the aforementioned details, the watch is water resistant to 100m, making it suitable for an array of leisure pursuits, including swimming, sailing and windsurfing.

 Click, to see the large size. ▶ BIG FOTO

The 1969 DeltaWorks is offered in an array of different coloured rubber straps. Grönefeld has selected FKM rubber in preference to conventional rubber as it proves more supple, more resistant and it retains its colour for longer. The exterior of the strap features a wave pattern, while the inside of the strap is decorated with a motif formed of numerous Grönefeld logos, allowing the wearer’s wrist to breathe. The strap can be cut to length for optimal sizing, while the micro adjustable clasp, featuring gleaming facets and relief engraving, allows the wearer to fine tune the union between the strap and the wrist.

 Click, to see the large size. ▶ BIG FOTO

The aforementioned pane of sapphire crystal, positioned to the rear of the watch, affords views of the beautifully appointed, self-winding movement. The case back features ‘GRÖNEFELD’ and ‘DELTAWORKS’ in relief, while the name ‘Oldenzaal’ is discretely engraved opposite the crown, an elegant reminder of where the Grönefeld family’s watchmaking story began.

The movement – no compromises

When conceiving the 1969 DeltaWorks, Bart & Tim were keen to ensure the watch was suitable for daily wear and compatible with an active lifestyle. With this in mind, they decided it must feature a self-winding movement encompassing the same exalted finishing as other Grönefeld timepieces. 

 Click, to see the large size. ▶ BIG FOTO

Put simply, the brother’s wouldn’t countenance any compromises. As such, the resultant movement, the calibre G-06, is worthy of the term ‘Haute Horlogerie’.

 Click, to see the large size. ▶ BIG FOTO

Brand devotees may recognise the calibre G-06, an automatic movement first used within the company’s 1941 Principia Automatic. However, while many elements have been carried over to the 1969 DeltaWorks, there are some additional details which enhance robustness, imbuing this version with its own distinctive character.

 Click, to see the large size. ▶ BIG FOTO

For instance, a notable feature specific to this model is the distinctive oscillating weight. The openworked architecture features four stainless steel arms, presented in a double-spoke design. These arms are connected to an 18K gold mass adorned with a wave motif. Each of the four arms is positioned beneath the gold mass and projects beyond, sitting above a circular ledge. Should the watch be subject to a sudden shock, the elongated arms will prevent the oscillating mass touching the inside of the sapphire crystal or striking the bridges below.

 Click, to see the large size. ▶ BIG FOTO

The movement is intended for the most discerning watch collectors. The rotor is completely hand finished and turns on ceramic ball bearings, preventing wear and eliminating the need for lubrication. Meanwhile, the stainless-steel bridges replicate the façades of traditional Dutch houses, termed ‘bell gables’. Each bridge features a micro-blasted central section, framed with a hand-bevelled gleaming edge. Some of the bridges also feature relief engraving. Each movement is fitted with a plate engraved with ‘ΔW’ (signifying DeltaWorks) along with its unique movement number.

 Click, to see the large size. ▶ BIG FOTO

The Grönefeld 5-arm, double spoke gear train wheels exhibit a contemporary character, but their circular grained surfaces pay due reverence to fine watchmaking tradition. Their design, as well as the bevelled escape wheel teeth, prevent the oil from dissipating, thereby mitigating wear. The free-sprung balance mitigates positional influence and delivers superior rate stability. The escapement is adjusted to heat-cold, isochronism and six positions.

 Click, to see the large size. ▶ BIG FOTOGold chatons stand testament to the no-compromise specification of this movement. In addition, the mirror polished screws feature chamfered rims and slots. Numerous surfaces gleam, courtesy of the mirror-polishing which has been patiently executed by time-served hands. The inventory of different decorations includes snailed, grained, spotted and frosted surfaces, indulging the desires of purists.

 Click, to see the large size. ▶ BIG FOTO 

Once again, there are no compromises. Everything is reassuringly Grönefeld.

A remarkable choice

When conceiving this watch, Bart & Tim wanted to produce a model that indulged purists with a remarkable choice of colours and styles. The 1969 DeltaWorks is available with 3 different dial designs/colours, 5 different strap options and, finally, a choice of stainless steel inserts or colour-coordinated FKM rubber-clad inserts.

 Click, to see the large size. ▶ BIG FOTO

The 1969 DeltaWorks is the distillation of three generations of watchmaking know-how, the professional journeys of both Horological Brothers and the manifestation of their extraordinary passion for horology.

 Click, to see the large size. ▶ BIG FOTO

  --------------------------------------------
Technical Specifications

Model: GRÖNEFELD – 1969 DeltaWorks    

 Click, to see the large size. ▶ BIG FOTO

 Click, to see the large size. ▶ BIG FOTO

 Click, to see the large size. ▶ BIG FOTO 

Movement

Calibre	G-06
Movement Dimensions	Diameter: 32.0 mm Thickness: 5.5 mm
Number of Parts	231 parts
Power Reserve	56 hours
Number of Jewels	31 jewels, partially set in solid gold chatons
Automatic System	Uni-directional winding mechanism. For 24 hours of autonomy 633 rotations of the Oscillating mass are required
Oscillating Mass	Entirely decorated by hand. 18 karat solid gold segment. Stainless steel centre pivoted on a high precision ceramic ball bearing to avoid excessive wear. To prevent damage to the movement and winding mass the extremities of the 4 arms are extended and guided by the case and case-back
Balance Wheel	Variable-inertia balance wheel with four white gold timing screws (diameter 10 mm)
Frequency	21.600 vibrations/hour
Balance Spring	Free sprung with triangle hairspring stud
Escapement	Jewelled Swiss lever
Main Plate	Spotted and ruthenium electroplated brass main plate
Bridges	Stainless steel, bevels polished by hand, micro-blasted center, circular grain on the top to highlight the bridges shapes and relief engravings
Displays	Central hours and minutes Small seconds at 6 o’clock

Case 

Number of components	68 parts
Dimensions	Diameter incl. case inserts: 44.5 mm Diameter bezel: 43.3 mm Thickness: 12.5 mm Lug to lug: 53 mm
Water Resistance	10 atmospheres – 100 meters – 330 feet
Material	Stainless steel AISI 316L (1.4435)
Crown	Screw down crown. Triple gaskets with upright logo
Hands	Flame-blued or polished steel extended Lancette hands with blue light emitting Super-LumiNova® Grade X1. Small poised seconds hand
Strap	Integrated FKM rubber strap available in black, olive, blue, white or orange
Clasp	Stainless steel 316L micro adjustable (7 increments over 9mm). Embossed Grönefeld and logo engraving. Opening must be done by operating both push buttons at once
Crystals	Domed sapphire crystal on the front with hard anti-reflective coating on both sides Flat sapphire crystal on the back with hard anti-reflective coating on both sides
Total Weight	135 Grams

Dial and Strap

The 1969 DeltaWorks is available with 3 different dial designs/colours, 5 different strap options and, finally, a choice of stainless steel inserts or colour-coordinated FKM rubber-clad inserts.

  Click, to see the large size. ▶ BIG FOTO

 🔴Price: Recommended retail EUR 49.800 💰 

 ----------------------------------------------------------
www.facebook.com - Gronefeld Watches
----------------------------------------------------------------
www.Gronefeld.com

GRONEFELD – 1941 Gronograaf Edition

GRÖNEFELD – 1941 Grönograaf Edition 2022

 Click, to see the large size. ▶ BIG FOTO

It was perhaps inevitable that Bart Grönefeld, would follow in the footsteps of his forefathers and become a watchmaker. Having completed his studies at the technical school in his home town of Oldenzaal, Bart enrolled at the school for watch technicians in Rotterdam. 

 Click, to see the large size. ▶ BIG FOTO

Already passionate about watchmaking, Bart’s fascination for horology grew exponentially when he attended WOSTEP in Neuchâtel, Switzerland. It was here that his teacher, Mr Antoine Simonin, showed the young man various pocket watches equipped with different complications. 

 Click, to see the large size. ▶ BIG FOTO

One particular pocket watch that Bart saw, featured steel bridges, a detail that provided the inspiration for Grönefeld’s distinctive stainless-steel bridges.

 Click, to see the large size. ▶ BIG FOTO

Similarly, Tim Grönefeld’s exposure to complications began at watchmaking school and was further heightened working on various complications in Le Locle. Again, it was Tim’s exposure to complex mechanisms that served to heighten his fascination with classical watchmaking.

 Click, to see the large size. ▶ BIG FOTO

Since 2008, Bart and Tim, ‘The Horological Brothers’, have produced a variety of unique mechanisms including a tourbillon minute repeater, a jumping seconds, a flying tourbillon with hacking seconds, etc… Their own unique take on classical watchmaking led to them winning two prestigious GPHG prizes: ‘Best Tourbillon’ for the Parallax model in 2014 and the ‘Best Men’s Watch’ for the 1941 Remontoire in 2016.

 Click, to see the large size. ▶ BIG FOTO

However, while both brothers have produced a number of different watches endowed with a variety of complications, they had never made a chronograph… until now.

 Click, to see the large size. ▶ BIG FOTO

The 1941 Grönograaf is the latest creation to be conceived in Oldenzaal. It is a classical chronograph, but consistent with the Grönefeld ethos, it incorporates several ingenious details. 

A purist’s movement

Unlike mass-produced cam-actuated chronographs, the 1941 Grönograaf features a classical configuration, namely a column-wheel and lateral coupling, a combination synonymous with high-end watchmaking. The calibre G-04 is a symphony of 408 parts and a wonderful exemplar of no-compromise watchmaking.

 Click, to see the large size. ▶ BIG FOTO

Mindful that chronograph movements are often subject to harsh forces that can sometimes scar hammers and bend hands, The Horological Brothers conceived a less aggressive system, a ‘soft reset’ mechanism. 

 Click, to see the large size. ▶ BIG FOTO

A centrifugal governor, positioned at 4 o’clock, typically seen on minute repeaters, slows down the reset function, thereby proving kinder to components while delivering a fascinating spectacle in the process. The governor includes two solid gold weights.

 Click, to see the large size. ▶ BIG FOTO

Depending on the position of the heart-shaped cams for the counter hands, the relevant minutes and seconds hands rotate clockwise or counter clockwise, heightening the sense of mechanical theatre. The 30-minute counter, located at 6 o’clock, features an instantaneous jumping minutes’.
 
 Click, to see the large size. ▶ BIG FOTO
The ruby jewelled hammers lessen the impact when returning to zero. The keyless works features a conical winding pinion and crown-wheel, delivering a smooth winding action. Every detail is intended to augment refinement. 

 

 Click, to see the large size. ▶ BIG FOTO

The variable inertia balance mitigates positional influence and offers superior rate stability. The Philips terminal overcoil enhances isochronism, effectively causing the balance spring to breathe more concentrically.

 Click, to see the large size. ▶ BIG FOTO

The main plate is embellished with spotting, while the bridges are formed of stainless steel, polished by hand. Moreover, the bridges have micro-blasted centres, circular graining on the top and feature various engravings in relief. 

Click, to see the large size. ▶ BIG FOTO

The heart-shaped cams, the elongated chronograph bridge, the gold chatons and the screw-heads are embellished with black polishing, performed in the traditional way using diamond paste on a tin plate. 

 Click, to see the large size. ▶ BIG FOTO

Consistent with earlier Grönefeld watches, the finishing is worthy of the term ‘Haute Horlogerie’. Indeed, everything is reassuringly Grönefeld.

The 1941 case, now in tantalum

In 2016, Bart and Tim released the 1941 Remontoire, honouring their father, Sjef, by referencing the year of his birth. The 1941 case, measuring 39.5mm, was subsequently used for the Principia automatic and the Decennium Tourbillon and has won favour with many watch collectors.

 Click, to see the large size. ▶ BIG FOTO

The sinuously shaped 1941 returns, albeit it is a smidgen larger, measuring 40mm in diameter. However, most notably, the case for the inaugural models, a limited edition of 25 pieces, is formed of the rare metal, tantalum. 

 Click, to see the large size. ▶ BIG FOTO

This material is hard, corrosion resistant, bioinert and exhibits a lustrous, blue-grey gleam. Tantalum is more than twice as dense as stainless steel, heavier than palladium and slightly lighter than gold.

The dial – a Dutch masterpiece

The hours and minutes are shown on an off-centre dial, a detail that first appeared on the 1896 One Hertz and later on the Parallax Tourbillon. The time is expressed with Lancette hands and the hours are denoted with crisp, trapezoidal indexes. The hands are flame-blued steel, upholding watchmaking tradition, while the centres are mirror polished.

 Click, to see the large size. ▶ BIG FOTO

As stated earlier, the centrifugal governor sits at 4 o’clock. When the reset to zero pusher is pressed, the governor bursts into life, not only serving a functional role but delivering a wonderful animated performance.

 Click, to see the large size. ▶ BIG FOTO

A 30-minute counter, located at the base of the dial, features a Breguet-style hand. The instantaneous jumping minutes facilitates ease of read-off. A subsidiary seconds display resides at 9 o’clock, while a power reserve indicator, positioned above, is equipped with a pointer, seemingly floating adjacent a track, conveying the status of the mainspring.

 Click, to see the large size. ▶ BIG FOTO

The central chronograph seconds hand subscribes to the classical Breguet-style and converses with a crisply-marked track positioned on the rehaut, proclaiming the elapsed seconds in an intelligible format. The ‘Premiere Edition’ of the 1941 Grönograaf will be encased in tantalum and limited to just 25 pieces. Thereafter, Grönefeld will release 188 pieces in stainless steel

 Click, to see the large size. ▶ BIG FOTO

The 1941 Grönograaf is the distillation of three generations of watchmaking know-how, of the professional journeys of both Horological Brothers and the manifestation of their extraordinary passion for horology.

 --------------------------------------------
Technical Specifications

Model: GRÖNEFELD – 1941 Grönograaf

 Click, to see the large size. ▶ BIG FOTO

•     1941 Grönograaf Stainless steel  (Edition of 188 pieces)

===============

 Click, to see the large size. ▶ BIG FOTO

•     1941 Grönograaf Tantalum (Edition of 25 pieces)

 Movement
    Calibre G-04
    Movement dimensions
        Diameter 32.0 mm
        Thickness 6.15 mm
    Number of parts: 408
    Power reserve: 53 hours
    Number of jewels: 45 jewels, partially set in solid gold chatons
    Chronograph:
        Column wheel, instantaneous jumping minutes and a gentle reset to zero mechanisms.
        Ruby jewelled hammer
    Balance wheel: Variable-inertia balance wheel with timing screws (diameter 10 mm)
    Frequency: 21.600 vibrations/hour
    Balance spring: Free sprung with Phillips terminal overcoil curve with Geneva style stud
    Escapement: Jeweled Swiss lever
    Main Plate: Spotted and ruthenium electroplated brass main plate
    Bridges:
        Stainless steel, bevels polished by hand, micro-blasted centre.
        Circular grain on the top to highlight the bridges shapes and engravings.
        Relief engraved Grönefeld logo and the number of jewels
    Governor: Speed regulator with gold weights for the gentle return to zero
Case and dial
    Diameter: 40.00 mm
    Thickness: 11.30 mm
    Water resistance: 3 atmospheres – 30 meters – 100 feet
    Material: Tantalum or Stainless Steel
    Crown: Tantalum or steel, engraved with The Horological Brothers logo
    Dial:
        Stainless steel base with rhodium-plated sub-dials and elements, frosted and satin-grained surfaces.

•  Decentral hours and minutes at 1 o’clock.
•  Subdial for seconds at 9 o’clock.
•  Power Reserve indicator at 11 o’clock.
•  Large central seconds counter.
•  30 minutes counter at 6 o’clock

    Governor: Visible “return to zero” speed regulator with gold weights at 3 o’clock
    Hands:
        Extended Lancette hands for hours and minutes.
        Poised Breguet style chronograph hands.
        Flame-blued steel and mirror-polished centres
    Strap: Leather 20mm-18mm
    Buckle: Pin buckle made in tantalum or steel engraved with Grönefeld. 18mm
    Crystals: Domed sapphire crystal on the front with hard anti-reflective coating on both sides. Flat sapphire crystal on the back with hard antireflective coating on both sides
    Total number of parts: 484 parts (Case: 36 Dial/hands: 40 Movement: 408)
    Total weight:
        Tantalum: 108 grams
        Stainless Steel: 85 grams

Availability
    Stainless steel: € 155,000 (Limited edition of 188 pieces)
    Tantalum: € 165,000 (Limited edition of 25 pieces) - Sold out !

 

----------------------------------------------------------
www.facebook.com - Gronefeld Watches
----------------------------------------------------------------

www.Gronefeld.com